Ariana Grande Says Emotional Good-Bye to Grandfather on Twitter

Ariana Grande has used her Instagram and Twitter feeds to craft what constitutes an emotional good-bye to her grandfather, who passed away on Tuesday.

This morning Grande announced that her grandfather had lost his battle with cancer and thanked her fans for their support throughout his illness: "thank you for your continuous love & light over the past few weeks... we did lose my favorite person to ever exist yesterday, my grandpa."

The singer and Sam & Cat star pulled herself together long enough to appear on Good Morning America this morning alongside Ryan Seacrest. The two were promoting the upcoming iHeart Radio Festival at which Grande will perform among a line-up that includes Cold Play, One Direction, Paramore, Ed Sheeran, Taylor Swift, and Usher.

Grande looked like she was having a hard time keeping a smile on her face during the interview.

Via Twitter, she told her fans that the "only reason I made this twelve hour trip is grandps told me he wanted me to always be professional & fulfill my business commitments."

if only y'all knew how amazing he was.. my heart hurts so much. It's beyond broken :'( but I got to hold his hand and watch him find his peace